Hacker News

Tech Stack used? Any specific non-technical difficulty getting this done ?

Definitely wind roses planned, I posted about them on my LinkedIn page if anyone is curious (linked on the main map).

That's a great point about the controls. Originally the map only showed wind farms and as I've expanded the features the control system (and really the entire UX) hasn't kept up. I need to sit down and have a proper think about how best to design the controls and documentation.

> New wind power records are set regularly, and between 5:30pm and 6:00pm on 5th December 2025 British wind farms averaged a record 23.94GW of generation.

Cool!

Hey! And thank you

1) Absolutely agree. The current approach for the boundaries is a quick hack until I can implement something more sophisticated. Safe to say an update is already in the works that adds a MW value and more insight into the state of each boundary (and is also more accurate in general)

2) "Please don't tell me that we are paying batteries to _not_ export" – it's actually the opposite, the batteries paid to not export (at least today). You can dig into this yourself via the Detailed System Prices dataset [0] and looking at one of the batteries on the sell stack (eg. KILSB-5)

[0] https://bmrs.elexon.co.uk/detailed-system-prices

Oh wow that's a blast from the past, feels like a lifetime ago! And thank you.

The most time and energy has been getting my head around the source data [0] and industry-specific nuances.

In terms of stack I have a self-hosted Dagster [1] data pipeline that periodically dumps the data onto Cloudflare R2 as parquet files. I then have a self-hosted NodeJS API that uses DuckDB to crunch the raw data and output everything you see on the map.

[0] Mostly from https://bmrs.elexon.co.uk/ [1] https://dagster.io/

Yup, that's exactly it! When you zoom in you get to see the wind farms and wind turbines using data from the amazing Open Infrastructure Map [0]. I also show the cables for the offshore wind farms.

[0] https://openinframap.org/

That's correct, it's using data from Open Infrastructure Map which is itself based on OpenStreetMap data. That's a good idea to zoom in further to show them off a bit more.

I actually have plans to include Ireland and Northern Ireland once I get the GB side nailed down. The data seems to be mostly available though I'd have to really think about how to make it work well on the app as it'd be a pretty fundamental change to how things currently work (assumes a single market).

Thanks!

Some solar power assets are being tracked though unfortunately (for now) I'm only able to display data for assets that report on the balancing system in Great Britain. This means most solar has no data that I can easily access.

I hope to work around this soon.

The squiggly ones across the country? Those are the National Energy System Operator (NESO) transmission boundaries for Great Britain. They represent areas of the country that are tracked for the purposes of managing constraints, which is when the transmission network over the boundary can't handle the amount of power flowing over it. When they are overloaded (or rather, before that happens) NESO will step in and "balance" the various zones by turning up or down generators.

Thank you

Yup! I have two ways to do it right now, the first is to click the plug-looking button on the map and this'll switch into curtailment mode to filter the assets that are currently being turned down due to transmission constraints, as well as the assets being turned-up elsewhere to balance things out. Also if you click on a curtailed assets you'll see the curtailment as a yellow area on the charts.

The other method is to visit my dedicated page [0] for tracking aggregate curtailment and turn-up, plus the costs for this.

[0] https://renewables-map.robinhawkes.com/curtailment

Do you approach coal power stations or oil rigs with the same level of scrutiny? I'll wait to hear back from you on the long list of environmental damage they cause. In your own time.